Splitting-machine.



T. LUND.

SPLITTING MACHINE.

APPLICATION FILED DEC-28,1915.

Patented Dec. 26,1916.

THOMAS LUND, OF BEVERLY,

MACHINERY COMPANY, OF PATER NEW JERSEY.

MAS-SAO'i-IUSET'IS, ASSIGNOE TO UNITED SHOE SON, NEW JERSEY, A CORPORATION OF ENT @FFQE SPLITTING-MACHIN E.

Specification of Letters Patent.

Patented Dec. 26, 1916.

Application filed December 28, 1915. Serial N 0. 69,000.

To all whom it may concern:

Be it known that I, THOMAS LUND, a citizen of the United States, residing at Beverly, in the county of Essex and State of Massachusetts, have invented certain Improvements in Splitting-Machines, of which the following description, in connection with the accompanying drawings, is a specification, like reference characters on the drawings indicating like parts in the several figures.

This invention relates to machines for splitting stock and is herein illustrated in connection with a machine for splitting or evening heel lifts.

The type of leather splitting machine which is commonly used comprises a pair feed rolls located one above the other and a knife located in the rear of said rolls. The knifehas a double bevel, its edge being located as near as practicable to the bite of the rolls; and when a piece of stock such as a heel lift blank is fed through the machine the finished lift passes over the knife and the chip or skiving beneath it. The rolls grip the blank along a narrow area with considerable force; and one effect of gripping and splitting the blank in the manner indicated is to impart to the finished lift an objectionable bend or curl.

The general object of the present invention is to take out this curl and to produce a product which shall be fiat.

One feature of the invention comprises in a machine of the class described, a pair of rolls for feeding a piece of stock, a knife for splitting a piece so fed, in the rear of said rolls for straightening said piece. This and other features of the invention including certain details of construction and combinationsof parts will be described in connection with an illustrative machine and pointed out in the appended claims.

Referring now to the accompanying drawing,-The figure is a side elevation of a machine in which the present invention is embodied, certain parts having been broken away and others having been shown in section.

The machine in its general organization is similar to that shown in United States patent to Nash No. 894,850. The feed rolls.

1 and 3 are driven in opposite directions through suitable gearing from a driving and means located shaft 5 so as to feed the stock to a station ary knife 7 which is located in the rear of said rolls. The lower roll is mounted in adjustable bearings which are normally held up against stops by heavy springs 9. The upper roll is mounted in adjustable bearings one of which is shown at 11, the extent of upward movement permitted said bearings being limited by wedges which may themselves be adjusted by turning the hand wheel 13. The thickness of the finished product is determined by the distance from the lowest portion of the upper roll to a horizontal plane through the edge of the knife; and this distance may be varied by manipulating the wheel 13.

The construction which has been outlined above is old and well known, and no further detailed description of it will be given.

With the construction described considerable difficulty has been experienced in that the finished product particularly when short pieces such as heel lifts are being evened is more or less permanently bent or curled. By referring to the drawing it will be seen that the chip or skiving 16 is curled down wardly. If no means were provided for exerting pressure upon the finished piece 18, said piece would curl upwardly in a similar manner and this curled or bent condition would be more or less permanent. In order to produce a finished product which shall be flat, a presser 15 is provided which in the illustrative machine has a flat face arranged parallel to the adjacent beveled face of the knife 7 20. As the skived bend or curl and the knife-clamp piece of stock begins to upwardly it encounters this presser and is pressed down and forced to travel in the straight passageway formed between the presser on one side and the knife and clamp on the other, the tendency to curlupwardly being resisted at all times by the presser. This presser 15 is adjustable with the bearings of the upper roll, being herein shown as fastened to said bearings by screws 17 and the distance from the presser to the adjacent faces of the knife and knife-clamp is made approximately equal to the distance from the lower portion of the upper roll to a horizontal plane through the. edge of the knife. The piece of stock is therefore engaged on both sides while being straightened.

Although the invention has been set forth in connection with a particular machine, it should be understood that the invention is not limited in the scope of its application to the particular machine shown and de scribed.

Having thus described my invention, 1

claim as new and desire to secure by Letters Patent ofthe United States:

1. Amachine of the class described haw 'ing, in combination, a pair of rolls for feed- 7 its edge close to the bite of the rolls whereor curl is imby as the piece is split a bend in the parted to it, and a memberarranged .rear of said rolls in position to exert pressure upon said piece n a direction and with sufficient force to straighten it. 7

3. A machine of the class described hav- Copies of this patent may be obtained for five cents each; by addressing cated in the rear 0 ing, in combination, a pair of rolls for feeding a piece of stock, a splitting knife 10- f said rolls and having its edge close to the bite of the rolls hereby as the piece is split a bend or curl is imparted to it, and means located in the rear of said rolls and arranged to engage both sides of said piece to straighten it.

4. A machine of the class described hays, splitting a piece of stock, a pair ofrolls for feeding said stock to said knife, adjustable bearings forone of said rolls,--and a presser located in the rear of said rolls the operative face of said presser being substantially parallel to the adjacent surface of the knife.

A machine of the class described,having, in combination, apair of rolls for feeding a piece of stock, a splitting knife located in the rear of said rolls and having its edge close to the bite of the rolls Where by as the piece is split a bend or curl is imparted to it, and means for holding the piece flat during the splitting operation. 7

in testimony whereof'l have signed my name to thls speellication.

THOMAS LUND.

the Commissioner of Patents,

Washington, 13.6.

in combination, a splitting knife for 7' 

